西南交通大学学报2011，Vol.46Issue(5)：745-751,7.DOI:10.3969/j.issn.0258-2724.2011.05.006
GFRP筋混凝土梁正截面受弯性能试验研究
Experimental Investigation of Flexural Behavior of Concrete Beams Strengthened with GFRP
摘要
Abstract
To deeply research the bending properties and design method of glass fiber reinforce plastic (CFRP) reinforced concrete beams, the flexural capacities of 36 concrete beams was investigated under the loading mode of four-point bending moment, including 21 GFRP reinforced concrete beams and 15 steel reinforced concrete beams. The deflection and flexural capacity were analyzed comparatively between the CFRP and steel reinforced concrete beams with the same parameters, such as reinforcement ratio, geometry size and concrete strength. The calculation formulas for the flexural capacities of the GFRP reinforced concrete beams and the critical relative depths of their compression zones were derived. The correctnesses of the formulas were proved with the test data. The research result shows that the ratio of the ultimate deflections of the two types of concrete beams is 1.5 to 2.5, the ratio of initial cracking load is 0. 53 to 0. 69, and the ratio of ultimate load is 0. 75 to 1. 02. In addition, the critical relative depth of the compression zone is from 0.17 to 0.20. It is suggested that reinforcement ratio should be equal to 1. 4 times of balanced reinforcement ratio to improve safety storage.关键词
GFRP筋混凝土梁/受弯承载力/极限承载能力/挠度/受压区高度Key words
GFRP ( glass fiber reinforce plastic) reinforced concrete beam/ flexural capacity/ load bearing capacity/ deflection/ relative depth of compression zone分类
建筑与水利引用本文复制引用
张志强,师晓权,李志业..GFRP筋混凝土梁正截面受弯性能试验研究[J].西南交通大学学报,2011,46(5):745-751,7.基金项目
国家自然科学基金资助项目(51078318) （51078318）
新世纪优秀人才支持计划资助项目(NCET-10-0667) （NCET-10-0667）
中央高校基本科研业务费专项资金资助项目(SWJTU09CX006) （SWJTU09CX006）
